The Console lead has four female connections that can be plugged directly onto the GPIO header of the Raspberry Pi.
The Adafruit USB console cable has 3.3V logic, so its safe to use with your Pi.
For this experiment, the serial lead is going to power the Raspberry Pi. So, DO NOT attach the Pi's USB power adapter. If you would rather power the Pi from your USB power adapter then leave the Red lead from the Serial lead un attached.
The important thing here is to only power it from one source, the USB power adaptor or the Console Lead BUT NOT BOTH.
Attach the leads as shown below:
The connections are to the outside pin connections of the GPIO header. See Lesson 4, for more information about the header: http://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/the-gpio-connector
- The red lead should be connected to 5V,
- The black lead to GND,
- The white lead to TXD.
- The green lead to RXD.
Now plug in the USB lead and you will see the Pi's power LED should light.